Okay, the rep checked with her supervisor and evidently they're also seeing "random fares for random dates" being loaded into their system, but only if they do a search at this point (for instance, when I told her my exact dates that I'd pulled up on Kayak and Sidestep, she was also able to pull them up). However, she said it could take a week to get all the fares in, and she suggested waiting until they're all in on the jetblue site before booking thru anywhere so that you have all the options and specials available as well.
So don't despair...just keep checking!
Christina
PS...If you see a fare you like (which seems doubtful at this point in time), you should be able to call jetblue and ask them to search your specific dates/flights and they should be able to book it.